|Rank|Name|Nationality|Time|Notes|
|---|---|---|---|---|
|1|Dyana Calub|Australia|1:01.77|Q|
|2|Natalie Coughlin|United States|1:01.99|Q|
|3|Noriko Inada|Japan|1:02.00|Q|
|4|Haley Cope|United States|1:02.09|Q|
|5|Diana MacManus|United States|1:02.10|Q|
|6|Courtney Shealy|United States|1:02.28|Q|
|7|Aya Terakawa|Japan|1:02.39|Q|
|8|Giaan Rooney|Australia|1:02.53|Q|
|9|Erin Gammel|Canada|1:02.63||
|10|Hannah McLean|New Zealand|1:02.82||
|11|Melissa Morgan|Australia|1:02.86||
|12|Reiko Nakamura|Japan|1:02.91||
|13|Michelle Lischinsky|Canada|1:03.22||
|14|Jennifer Fratesi|Canada|1:03.42||
|15|Kelly Stefanyshyn|Canada|1:03.44||
|16|Clementine Stoney|Australia|1:03.52||

Question: how many swimmers were there from the united states in the top five in the semifinals?
Answer: 3